Electric hair-brush.



E. LOEWENHERZ.

ELECTRIC HAIR BRUSH.

APPLICATION FILED SEPTl I I, 1913.

Patented Sept. 5, 1916.

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EMANUEL LOEWENIIERZ, OF CHICAGO, ILLINOIS.

ELECTRIC HAIR-BRUSH.

Application filed September 11, 1913.

To all whom t may concern Be it known that I, EMANUEL LonwEN- HERZ, a subject of the Emperor of Austria- I-Iungary, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Electric Hair-Brushes, of which the following is a specification.

This invention relates to electric hairbrushes.

An object of the invention is to provide a brush adapted to subject the scalp (or other parts of the skin) to the action of heat radiating from bristles of the brush.

Another object of the invention is to provide a brush wherein diderent kinds of bristles may be combined, a relatively softbristlc being used for contact treatment of the skin or scalp while a metal bristle is used for the purpose of increasing the radiation of heat toward the skin or scalp. Y

Another object of the invention is, to provide a brush wherein the bristles which come into contact with the skin have lower heat conductivity than other bristles.

Another object of the invention is to provide a brush which is built up of a plurality of interchangeable units, facilitating thereby the insertion or removal of a predetermined number of bristle carriers, each carrier holding packages combined of hair bristles and metal bristles, or composed of hair bristles only, or of metal bristles only.

With these and other objects in view the subject-matter of the invention is illustrated i in several embodiments in the accompanying drawing.

In the drawing: Figure 1 is a plan view of a brush of this kind. Fig. 2 is a longitudinal vertical section on line A-A of Fig. 1.

The brush preferably comprises a back 11 equipped with a handle 12 which may be formed integral with the back. A casing 13 is secured in some suitable way, as for instance by screws 111 to the back of the brush,

: this casing serving as a support for the bristles and also serving in the embodiment shown as a receptacle for the heating elements. Like in most of the brushes in common use the bristles are united to form packages or bundles 15 the inner ends of which are secured in the casing 13 while the outer ends project therefrom. As may be seen from Figs. 1 and 2 each of these bundles 15 is held within a perforated boss 16 projecting from the surface of the casing. According to Figs. 1 and 2 each of these bundles Specification of Letters atent.

Patented Sept. 5, 1916.

Serial No. 789,315.

consists of a plurality of ordinary hair bristles 17 and a metal bristle, or wire 18 preferably disposed in the center of the bundle. The hair bristles 16 are adapted to effect a suitable treatment of the scalp or skin in the ordinary manner by friction. These bristles having a relatively low heat conductivity; the pins 18 however which form part of each bundle have a relatively high heat conductivity and, projecting into the midst of the other bristles, they are well adapted to heat those portions of the skin or scalp which are at the same time frictionally treated by the other bristles. In order to prevent the pins or wires 18 having a higher heat conductivity from coming into contact with the skin these pins are somewhat shorter than the other bristles of the same bundles. lThe casing 13 holding these bundles 15 of bristles may be set into a recess 21 in the back 11 of the brushand is preferably packed against the walls of the recess and against the bottom of the same by strips 22 and pads 20 respectively of asbestos. The pad and strips of asbestos 22 serve for preventing the transmission of the heat to other parts of the brush. The heating element-s, consisting in the embodiments shown, of insulated plates 23 surrounded by windings of wire 241 of high resistance are held within the casing. The contact of the bristles 1G and 17 with the heating elements is prevented by a plate 26 of mica or the like resting on the heating elements. The bundles 15 are held against the top surface of the casing by a thin sheet of metal 29 or the like which is inserted into the inner space of t-he casing so as to purchase resiliently against the lateral walls of the casing. This plate 29 of sheet metal forms a yielding abutment for the bristle bundles and especially for the wire 17. The latter are provided with a head 31 which rests against the plate 29 of sheet metal, as shown.

I am aware that many changes may be made in the form and constructions of this electric brush without departing from the spirit of my invention and I do not wish to limit myself to the construction shown and described except where so stated in the claims.

I claim:

1. In a device of the character described, the combination of bristle bundles composed of bristles having a relatively low heat conductivity and bristles having a relatively high heat conductivity, and means for transmitting heat to the last named bristles.

2. In a brush, the combination of a back, a plurality of heat radiating bristles secured to said back, other bristles of low heat conductivity secured to said back in position adapted to prevent access to the sides of the heat radiating bristles and means for heating said heat radiating bristles.

3. In an electric brush, the combination l of a plurality of bristles, a casing through which said bristles project, a yielding abutment inserted in said casing and in engagement with the inner ends of said bristles,

` and heating elements in said casing.

4f. In an electric brush, the combination of a plurality of flexible bristles, a supporting structure for the same and a flat heating element disposed entirely Within said supporting structure.

im and a back, said metal projections and bristles being secured on the said back.

7. In an electric brush, the combination of a back, bristles having a relatively loW heat conductivity mounted on said back, metal projections also mounted on said back, and means for electrically heating said metal projections, said metal projections being shorter than said bristles.

8. In an electric brush, the combination of a back, bristles having a relatively low heat conductivity mounted on said back, metal projections also mounted on said back, and means for heating said metal projections, said metal projections being shorter than said bristles.

9. In an electric brush the combination of a back, bristles having a relatively low heat conductivity mounted on said back, heat radiating projections interspersed between said bristles and uniformly distributed over the top surface of the back, said heat radiating projections being shorter than said bristles, and means for heating said projections. j

In testimony whereof I have hereunto set my hand in the presence of the tivo subscribing Witnesses.

EMANUEL LGEVVENHERZ.

Witnesses FELIX STERN, LoUisE BATES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of 'Patents Washington, D. C. 

